165168319 has 2 divisors, whose sum is σ = 165168320. Its totient is φ = 165168318.

The previous prime is 165168307. The next prime is 165168323. The reversal of 165168319 is 913861561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165168319 - 2⁵ = 165168287 is a prime.

It is a super-2 number, since 2×165168319² = 54561147202571522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165168329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82584159 + 82584160.

It is an arithmetic number, because the mean of its divisors is an integer number (82584160).

Almost surely, 2^165168319 is an apocalyptic number.

165168319 is a deficient number, since it is larger than the sum of its proper divisors (1).

165168319 is an equidigital number, since it uses as much as digits as its factorization.

165168319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 165168319 is about 12851.7827168063. The cubic root of 165168319 is about 548.6670963361.

The spelling of 165168319 in words is "one hundred sixty-five million, one hundred sixty-eight thousand, three hundred nineteen".